1. 新建两个视图控制器类(继承自UIViewController), 在AppDelegate.m中指定根视图控制器

#import "AppDelegate.h"#import "RootViewController.h"#import "LeadViewController.h"@interface AppDelegate ()@end@implementation AppDelegate- (void)dealloc{    self.window = nil;    [super dealloc];}- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];    // Override point for customization after application launch.    self.window.backgroundColor = [UIColor whiteColor];    [self.window makeKeyAndVisible];        // 在用户的偏好设置中做标记,判断用户是否是第一次打开应用//    [NSUserDefaults standardUserDefaults]; // 获取用户的偏好设置选项    BOOL isFirst = [[NSUserDefaults standardUserDefaults] boolForKey:@"NB"];    NSLog(@"isFirst = %d", isFirst); // 第一次打印为0 ,第二次打印为1    if (isFirst) {// 若为真,直接进入应用                RootViewController *rootVC = [[RootViewController alloc] init];        self.window.rootViewController = rootVC;        [rootVC release];            } else { // 若为假,启动引导页                LeadViewController *leadVC = [[LeadViewController alloc] init];        self.window.rootViewController = leadVC;        [leadVC release];            }               return YES;}

 2. 在LeadViewController中写主要代码

////  LeadViewController.m/** *  引导页面制作 * */#import "LeadViewController.h"#import "RootViewController.h"#define kScreenWidth [UIScreen mainScreen].bounds.size.width#define kScreenHeight [UIScreen mainScreen].bounds.size.height#define kImageCount 6@interface LeadViewController ()
     
      @property (nonatomic, retain) UIPageControl *pageControl;@property (nonatomic, retain) UIScrollView *scrollView;@end@implementation LeadViewController- (void)dealloc{    self.pageControl = nil;    self.scrollView = nil;    [super dealloc];}- (void)viewDidLoad {    [super viewDidLoad];    //self.view.backgroundColor = [UIColor redColor];        [self configureScrollView];     [self configurePageControl]; //! 先调用这个方法的话,后来的scrollView就会把pageControl给盖住            }// 配置滚动视图- (void)configureScrollView {        self.scrollView = [[UIScrollView alloc] initWithFrame:[UIScreen mainScreen].bounds];    _scrollView.backgroundColor = [UIColor yellowColor];    // 内容区域大小    _scrollView.contentSize = CGSizeMake(kImageCount * kScreenWidth, kScreenHeight); // 内容区域宽度为图片个数*屏幕宽度    [self.view addSubview:_scrollView];    [_scrollView release];        // 向_scrollView上添加imageView对象    for (int i = 0; i < kImageCount; i++) {        // 准备图片        UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"v6_guide_%d", i+1]];        // 创建UIImageView对象        UIImageView *imageView = [[UIImageView alloc] initWithImage:image];        // 设置frame        imageView.frame = CGRectMake(kScreenWidth * i, 0, kScreenWidth, kScreenHeight); //!                //! 让_scrollView整页滑动        _scrollView.pagingEnabled = YES;        //! 关闭弹簧效果        _scrollView.bounces = NO;                _scrollView.delegate = self; // 添加代理,处理事件                [_scrollView addSubview:imageView];                [imageView release];                // 最后一张图片添加轻拍手势        if (5 == i) {                        imageView.userInteractionEnabled = YES; //!UIlabel和UIimageView的默认交互是关的                        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];                        [imageView addGestureRecognizer:tap];// 手势添加到imageView上                        [tap release];                    }    }    }// 实现手势关联的事件- (void)handleTap:(UITapGestureRecognizer *)tap {    // 设置用户的偏好设置    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"NB"];    // 更改应用window的根视图控制器//    [UIApplication sharedApplication] 取出当前应用对象    RootViewController *rootVC = [[RootViewController alloc]init];        [UIApplication sharedApplication].keyWindow.rootViewController = rootVC; // 这个window和AppDelegate.m中的window是一个window        [rootVC release];        }// 配置分页控制器- (void)configurePageControl {    self.pageControl = [[UIPageControl alloc] initWithFrame:(CGRectMake(0, kScreenHeight - 40, kScreenWidth, 30))];// 在屏幕下方添加pageContro    //_pageControl.backgroundColor = [UIColor blackColor];    // 分页个数    _pageControl.numberOfPages = kImageCount;    // 当前点的颜色    _pageControl.currentPageIndicatorTintColor = [UIColor greenColor];    // 其他点的颜色    _pageControl.pageIndicatorTintColor = [UIColor yellowColor];    // 添加关联事件    [_pageControl addTarget:self action:@selector(handlePageControl:) forControlEvents:(UIControlEventValueChanged)];    // 添加到视图控制器上    [self.view addSubview:_pageControl];    [_pageControl release];    }#pragma maek - 实现代理方法(协议中的方法)- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {    // 减速结束时取出偏移量    CGPoint offSet = scrollView.contentOffset;    CGFloat number = offSet.x / kScreenWidth;    _pageControl.currentPage = (NSInteger)number; // image与点关联  scrollView 与 pageControl关联}// 实现分页控制器关联的方法- (void)handlePageControl:(UIPageControl *)sender {    // 取出当前分页    NSInteger number = sender.currentPage;    // 通过分页控制scrollView的偏移量    _scrollView.contentOffset = CGPointMake(number * kScreenWidth, 0); // 点与image关联  pageControl 与 scrollView关联}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end
     

UIPageControl和UIScrollView这两种UI控件的结合使用,很常见,APP第一次打开时的引导界面用这两个控件就可以完成了~